<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>参数列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片区域 -->
		<el-card>
			<!-- 警告区域 -->
			<el-alert
			    title="注意:只允许第三季分类设置相关参数"
			    type="warning" :closable="false" show-icon>
			</el-alert>
			<!-- 选择商品区域 -->
			<el-row>
				<el-col class="cat_opt">
					<span>选择商品分类:</span>
					<!-- 选择商品分类的级联 -->				
					<el-cascader
					    v-model="seletedCateKeys"
					    :options="cateList"
					    :props="{ expandTrigger: 'hover', value:'cat_id',label:'cat_name',children:'children'}"
					    @change="handleChange">
					</el-cascader>
				</el-col>
			</el-row>
			<!-- tab页签区域 -->
			<el-tabs v-model="activeName" @tab-click="handleTabClick">
				<!-- 添加动态参数 -->
			    <el-tab-pane label="动态参数" name="many">
					<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
					<!-- //动态参数表格 -->
					<el-table :data="manyTableData" border stripe>
						<!-- 展开行 -->
						<el-table-column type="expand">
							<template v-slot="scope">
								<!-- 循环渲染Tag标签 -->					
								<el-tag v-for="(item,i) in scope.row.attr_vals" 
								:key="i" closable 
								@close="handleClose(i,scope.row)">
									{{item}}
								</el-tag>
								<!-- 输入文本框 -->
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
							</template>
						</el-table-column>
						<!-- 索引列 -->
						<el-table-column type="index"></el-table-column>
						<el-table-column label="参数名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作">
							<template v-slot="scope">
								<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
								<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
				<!-- 添加静态属性 -->
			    <el-tab-pane label="静态属性" name="only">
				<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
				<!-- 静态属性表格 -->
				<el-table :data="onlyTableData" border stripe>
					<!-- 展开行 -->
					<el-table-column type="expand">
						<template v-slot="scope">
							<!-- 循环渲染Tag标签 -->					
							<el-tag v-for="(item,i) in scope.row.attr_vals" 
							:key="i" closable 
							@close="handleClose(i,scope.row)">
								{{item}}
							</el-tag>
							<!-- 输入文本框 -->
							<el-input
							  class="input-new-tag"
							  v-if="scope.row.inputVisible"
							  v-model="scope.row.inputValue"
							  ref="saveTagInput"
							  size="small"
							  @keyup.enter.native="handleInputConfirm(scope.row)"
							  @blur="handleInputConfirm(scope.row)"
							>
							</el-input>
							<!-- 添加按钮 -->
							<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
						</template>
					</el-table-column>
					<!-- 索引列 -->
					<el-table-column type="index"></el-table-column>
					<el-table-column label="属性名称" prop="attr_name"></el-table-column>
					<el-table-column label="操作">
						<template v-slot="scope">
							<el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
							<el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
						</template>
					</el-table-column>
				</el-table>
				</el-tab-pane>
			</el-tabs>
		</el-card>
		<!-- 添加参数的对话框 -->
		<el-dialog
		  :title="'修改'+titleText()"
		  :visible.sync="addDialogVisible"
		  width="50%"
		  @close="addDialogClosed">
		  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
		    <el-form-item :label="titleText()" prop="attr_name">
		      <el-input v-model="addForm.attr_name"></el-input>
		    </el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addParams">确 定</el-button>
		  </span>
		</el-dialog>
		<!-- 修改参数的对话框 -->
		<el-dialog
		  :title="'修改'+titleText()"
		  :visible.sync="editDialogVisible"
		  width="50%"
		  @close="editDialogClosed">
		  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
		    <el-form-item :label="titleText()" prop="attr_name">
		      <el-input v-model="editForm.attr_name"></el-input>
		    </el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editParams">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default{
		data(){
			return{
				cateList:[],
				seletedCateKeys:[],
				activeName:'many',
				//动态参数
				manyTableData:[],
				//静态属性
				onlyTableData:[],
				addDialogVisible:false,
				addForm:{attr_name:''},
				addFormRules:{
					attr_name:[
						  { required: true, message: '请输入参数名称', trigger: 'blur' }
					]
				},
				editDialogVisible:false,
				editForm:{attr_name:'',attr_id:''},
				editFormRules:{
					attr_name:[
						  { required: true, message: '请输入参数名称', trigger: 'blur' }
					]
				},
				removeDialogVisible:false,
			}
		},
		created(){
			//获取所有商品分类列表
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const {data:res}=await
			 	this.$http.get('categories')
				if(res.meta.status!==200){
					return this.$message.error('获取商品分类失败')
				}
				this.cateList=res.data
			},
			async handleChange(){
				this.getParamsData()
				
			},
			handleTabClick(){
				console.log(this.activeName)
				this.getParamsData()
			},
			async getParamsData(){
				if(this.seletedCateKeys.length!==3){
					this.seletedCateKeys=[]
					this.manyTableData=[]
					this.onlyTableData=[]
					return 
				}
				//根据所选分类id和当前所处面板，获取对应参数
				const {data:res}=await
				this.$http.get(`categories/${this.cateId}/attributes`,
				{params:{sel:this.activeName}})
				if(res.meta.status!==200){
					return this.$message.error('获取参数列表失败')
				}
				res.data.forEach(item=>{
					item.attr_vals=item.attr_vals ? item.attr_vals.split(' ') : []					
					//添加一个布尔值 控制显示框的显示和隐藏
					item.inputVisible=false	
					// 文本框中输入的值
					item.inputValue=''
					console.log(item.attr_vals)
				})
				if(this.activeName==='many'){
					this.manyTableData=res.data
				}else{
					this.onlyTableData=res.data
				}
			},
			//动态计算标题文本
			titleText(){
				if(this.activeName==='many'){
					return '动态参数'
				}else{
					return '静态属性'
				}				
			},
			addDialogClosed(){
				this.$refs.addFormRef.resetFields()
			},
			addParams(){
				this.$refs.addFormRef.validate(async valid=>{
					if(!valid) return
					const {data:res}=await
					this.$http.post(`categories/${this.cateId}/attributes`,
					{attr_name:this.addForm.attr_name,attr_sel:this.activeName})
					console.log(res)
					if(res.meta.status!==201){
						return this.$message.error('添加失败')
					}					
					this.addDialogVisible=false
					this.getParamsData()
				})
			},
			async showEditDialog(attr_id){
				//查询当前参数的信息
				const{data:res}=await
				this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}})
				if(res.meta.status!==200){
					return this.$message.error('获取参数信息失败')
				}
				this.editForm=res.data
				this.editDialogVisible=true
			},
			editDialogClosed(){
				this.$refs.editFormRef.resetFields()
			},
			//点击按钮修改参数信息
			editParams(){
				this.$refs.editFormRef.validate(async valid=>{
					if(!valid) return
					const {data:res}=await
					this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
					{attr_name:this.editForm.attr_name,attr_sel:this.activeName})
					console.log(res)
					console.log(res.data)
					if(res.meta.status!==200){
						return this.$message.error('修改参数信息失败')
					}					
					this.editDialogVisible=false
					this.getParamsData()
				})
			},
			//根据id删除对应的参数
			async removeParams(attr_id){
				const confirmResult=await
				this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				}).catch(err=>err)
				if(confirmResult!=='confirm'){
					return this.$message.info('已取消删除')
				}
				const {data:res}=await
				this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
				if(res.meta.status!==200){
					return this.$message.error('删除分类失败！')
				} 
				this.$message.success('删除参数成功')
				this.getParamsData()
			},
			//文本框enter或失去焦点触发
			async handleInputConfirm(row){
				if(row.inputValue.trim().length===0){
					row.inputValue=''
					row.inputVisible=false
					return
				}
				// 输入的内容后续处理
				row.attr_vals.push(row.inputValue.trim())
				row.inputValue=''
				row.inputVisible=false
				//发起请求 保存这次操作
				this.saveAttrVals(row)
			},
			// 将对attr_vals的操作保存到数据库
			async saveAttrVals(row){
				//发起请求 保存这次操作
				const {data:res}=await
				this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
				{attr_name:row.attr_name,attr_sel:row.attr_sel,attr_vals:row.attr_vals.join(' ')})
				if(res.meta.status!==200){
					return this.$message.error('修改参数项失败！')
				} 
				this.$message.success('修改参数项成功')
			},
			// 点击按钮 展示文本输入框
			showInput(row){
				row.inputVisible=true
				//文本框自动获得焦点
				 this.$nextTick(_ => {
				          this.$refs.saveTagInput.$refs.input.focus();
				 });
			},
			// 删除对象参数项
			handleClose(i,row){
				row.attr_vals.splice(i,1)
				this.saveAttrVals(row)
			}
		},
		computed:{
			//如果按钮需要被禁用，返回true
			isBtnDisabled(){
				if(this.seletedCateKeys.length!==3){
					return true
				}
				return false
			},
			//当前选中的三级id
			cateId(){
				if(this.seletedCateKeys.length===3){
					return this.seletedCateKeys[2]
				}
				return null
			}
		}
	}
</script>

<style scoped>
	.cat_opt{
		margin: 15px 0;
	}
	.el-cascader{
		padding: 10px;
	}
	.input-new-tag{
		width: 150px;
	}
</style>
